Einstein was believed to be a middle aged dog in 1985 and was named after the influential scientist Albert Einstein. Einstein is known for his collaborations with his owner Emmett “Doc” Brown, but is often overshadowed by Brown’s friend Marty McFly. Einstein appeared to be Doc’s only friend outside of Marty and his girlfriend Jennifer and the Doc loved him so much that he created a machine that fed him automatically every morning. People forget that Einstein is actually the first real time traveler and he did so without fucking with the present at all. What a bad ass.

Einstein was played by a dog named Tiger in the first film but was then replaced for the two sequels and I bet you never noticed. NINJA! NINJA DOG. KICK ASS!